package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    //新增菜品
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);//属性拷贝
        dishMapper.insert(dish);//向菜品中插入一条数据
        Long dishId = dish.getId();//获取insert语句 生成id值
        List<DishFlavor> flavors = dishDTO.getFlavors();//获取口味
        if(flavors != null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表中插入n条数据
            dishFlavorMapper.insertBatch(flavors);
    }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //通过PageHelper获取当前页面和页面大小
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        //将DTO数据传递 --->使用DishVO封装
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        //返回总条数和结果
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品删除
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断商品是不是已经起售 （起售不能删除）
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);//获取菜品id
            if(dish.getStatus() == StatusConstant.ENABLE){
                //起售中的商品不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);//如果是起售 抛出异常
            }
        }
        //判断是否被套餐关联 （关联不能删除）
        List<Long> setMealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setMealIds != null && setMealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);//包括套餐 不能删除
        }
        //直接删除(根据id删除---->删除口味表中的数据)
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    /**
     * 起售禁售商品
     * @param status
     * @param id
     */
    @Override
    public void saleOrNoSale(Integer status, Long id) {
        Dish dish = Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }

    /**
     *根据id进行查询并查询出对应的口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到vo中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }


    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);//属性拷贝
        dishMapper.update(dish);//进行更新
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if(dishFlavors != null && dishFlavors.size() >0){
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入数据
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 菜品按照分类展示
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        return dishMapper.list(dish.getCategoryId(),dish.getStatus());
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        log.info("dishservice实现类：{}",dish);
        List<Dish> dishList = dishMapper.list(dish.getCategoryId(),dish.getStatus());
        List<DishVO> dishVOList = new ArrayList<>();
        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);
            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }
}